Re: [pve-devel] [PATCH docs] system-requirements: mention that SSDs with PLP should be used

[Aaron Lauterer <a.lauterer@proxmox.com>]

On  2024-03-20  10:30, Fiona Ebner wrote:
> Am 20.03.24 um 09:56 schrieb Aaron Lauterer:
>> Signed-off-by: Aaron Lauterer <a.lauterer@proxmox.com>
>> ---
>>   pve-system-requirements.adoc | 2 ++
>>   1 file changed, 2 insertions(+)
>>
>> diff --git a/pve-system-requirements.adoc b/pve-system-requirements.adoc
>> index bc3689d..4db5358 100644
>> --- a/pve-system-requirements.adoc
>> +++ b/pve-system-requirements.adoc
>> @@ -49,6 +49,8 @@ Recommended System Requirements
>>     (BBU) or non-RAID for ZFS and Ceph. Neither ZFS nor Ceph are compatible with a
>>     hardware RAID controller.
>>   ** Shared and distributed storage is possible.
>> +** SSDs with Power-Loss-Protection (PLP) are recommended for good performance.
>> +  Using consumer SSDs is discouraged.
>>   
> 
> Having PLP might correlate with having good performance, but it's not
> the reason for good performance and good performance is not the reason
> you want PLP. It's just that both things are present in many enterprise
> SSDs, I'd mention that explicitly to avoid potential confusion.

When it comes to sync writes, it is definitely one reason for the good 
performance ;)
But yeah, let's think about it, what about the following?:


Enterprise grade SSDs are recommended for good performance. Checking for 
  Power-Loss-Protection (PLP) is a good way to avoid consumer grade 
SSDs. The use of consumer grade SSDs is discouraged.


Not too happy with that either, but phrasing it correctly and succinct 
is an art in itself.

> 
>>   * Redundant (Multi-)Gbit NICs, with additional NICs depending on the preferred
>>     storage technology and cluster setup.